SME
Engineering Graphics & CAD · Problem type
Line types on a drawing
Use this for “Which line on this drawing is a hidden line, and which is a center line?”
Sort
Which kind of line is lit?
Tap a card, then tap its group.
Ask what the line stands for: an edge in sight, an edge out of sight, an axis or a size.
Assumptions
•
Visible lines are thick and solid; hidden lines are thin dashes; center lines alternate long and short dashes.
•
Dimension and extension lines are thin and solid; the size is written on the dimension line.
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.
Related lessons
Orthographic and isometric projection
Main lesson
Isometric projection length
Use this for “A 50 mm edge runs along an isometric axis. How long is it on a true isometric projection?”
First-angle or third-angle projection
Use this for “The top view is drawn below the front view. Is this drawing first angle or third angle?”